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Finding the Fourth Proportional to 12,915.64, 19,346.16 and 7,366.12

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Solution

The fourth proportional to 12,915.64, 19,346.16 and 7,366.12 is: 11,033.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,915.64 : 19,346.16 = 7,366.12 : x
  2. Step 2: Convert to fraction form
    12,915.64/19,346.16 = 7,366.12/x
  3. Step 3: Cross multiply
    12,915.64x = 19,346.16 × 7,366.12
  4. Step 4: Simplify right side
    12,915.64x = 142,506,136.10
  5. Step 5: Solve for x
    x = 142,506,136.10/12,915.64
  6. Step 6: Final answer
    x = 11,033.61

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.